在我的一個視圖中，我有一個表單，當用戶登錄并提交表單時，它作業正常。
但是，當匿名用戶提交表單時，我收到以下錯誤：
Cannot assign "<SimpleLazyObject: <django.contrib.auth.models.AnonymousUser object at 0x1052fd3a0>>": "User_Inquiries.user" must be a "CustomUser" instance.
無論用戶是匿名用戶還是登錄用戶，都需要提交此表單。我需要做什么才能解決此問題？
代碼如下。
任何幫助都非常感謝。謝謝！
視圖.py
def account_view_contact(request):
form = ContactUsForm(request.POST or None, request.FILES or None,)
user_profile = User_Inquiries.objects.all()
user_profile = User_Info.objects.all()
user = request.user
if request.method == "POST": # checking if request is POST or Not
# if its a post request, then its checking if the form is valid or not
if form.is_valid():
contact_instance = form.save(commit=False) # "this will return the 'Listing' instance"
contact_instance.user = user # assign 'user' instance
contact_instance.save() # calling 'save()' method of model
return redirect("home")
context = {
'form': form, 'user_profile': user_profile
}
return render(request, 'contact.html', context)
模型.py
class User_Inquiries(models.Model):
email = models.EmailField(max_length=100, null=True)
name = models.CharField(max_length=100, null=True)
subject = models.CharField(max_length=100, null=True)
message = models.CharField(max_length=100, null=True)
user = models.ForeignKey(settings.AUTH_USER_MODEL, null=False, on_delete=models.CASCADE)
date_submitted = models.DateTimeField(auto_now_add=True, null=True)
class Meta:
verbose_name_plural = "User Inquiries"
@property
def user_message(self):
return truncatechars(self.message, 30)
uj5u.com熱心網友回復：
你可以做的是：
首先，添加一個用戶欄位null=True
class User_Inquiries(models.Model):
# ....
user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, on_delete=models.CASCADE)
# ...
其次，在您看來，user僅當用戶通過身份驗證時才需要提供該欄位。因為AnonymousUser可以保存在資料庫中。
def account_view_contact(request):
user_profile = User_Info.objects.all()
# If it's a post request
if request.method == "POST":
form = ContactUsForm(request.POST, request.FILES or None,)
if form.is_valid():
if request.user is authenticated:
# Only authenticated user can be assigned
contact_instance = form.save(commit=False)
contact_instance.user = request.user
contact_instance.save()
return redirect("home")
else:
# Save the form without user because no user is logged in
form.save()
# Handle no POST request
else:
form = ContactUsForm()
context = {
'form': form, 'user_profile': user_profile
}
return render(request, 'contact.html', context)
uj5u.com熱心網友回復：
User_Inquiries 模型用戶應該是空白 = True 和 null = True。在視圖中檢查用戶是否登錄，然后將 contact_instance.user 設定為 user。
模型.py
class User_Inquiries(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, blank=True, on_delete=models.CASCADE)
視圖.py
def account_view_contact(request):
form = ContactUsForm(request.POST or None, request.FILES or None,)
user_profile = User_Inquiries.objects.all()
user_profile = User_Info.objects.all()
# check if the user is authenticated
if request.user.is_authenticated:
user = request.user
if request.method == "POST": # checking if request is POST or Not
# if its a post request, then its checking if the form is valid or not
if form.is_valid():
contact_instance = form.save(commit=False) # "this will return the 'Listing' instance"
contact_instance.user = user # assign 'user' instance
contact_instance.save() # calling 'save()' method of model
return redirect("home")
context = {
'form': form, 'user_profile': user_profile
}
return render(request, 'contact.html', context)
檢查用戶是否在 django 中通過身份驗證
設定 null 和空白 = True
uj5u.com熱心網友回復：
我嘗試了上述解決方案，并且奏效了。我還使用 CreateView 來解決這個問題，并且它完美無缺。代碼如下：
class account_view_contact(CreateView):
model = User_Inquiries
form_class = ContactUsForm
template_name = "contact.html"
success_url = reverse_lazy("home")
def form_valid(self, form):
if self.request.user.is_authenticated:
self.object = form.save(commit=False)
self.object.created_by = self.request.user
self.object.save()
else:
self.object = form.save(commit=False)
self.object.save()
return super().form_valid(form)
謝謝大家！
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